du shane



2 Sheets-Sheet 1.

(No Model.)

J. DU SHANE.

DYNAMO ELECTRIC MACHINE.

Patented 1360.18, 1883.

I72 Van/fir.

fr' WW AZZarzzqy grlpher, Washinglun.

UNITED STATES PATENT @irrrcs.

DYNAMO-ELECTRIC MACHENE.

SPECTFICATION forming part of Letters Patent No. 290,550, dated December 18, 1883.

Application filed September 29, 1882. Renewed July 4, 1583.

(X0 model.)

To aZZ whom, it may concern.-

Be it known that I, Janus DU Snaxn, of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Dynamo-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference beinghad to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specifica-tion.

Figure 1 is a perspective view of a dynamoelectric machine embodying my improvements. Fig. 2 is a detail view of one of the polar castings. 3 is a sectional view of the armature. Fig. 4 is a detail view of portions thereof.

This invention relates to improvements in construction of dynamo-electric machines.

Similar letters of reference denote like parts.

The magnets AA are composed of two castiron pieces formed with angular extensions F at their ends, by which they are secured to suitable kneepieces, O O, secured to an insulated base. The magnets are connected at their ends and have opposite poles in the center, one above and one below. The metal at this point, being thicker than elsewhere, is curved to conform to the shape of the armature, and is internally corrugated or grooved, as shown at a. The helices N N are wound on the ends of the castings A A in the'ordinar r manner, except that the castings themselves are angular in outline, so that when secured together there is an open diamond-shaped space between them, wider in the middle than elsewhere, by which arrangement the frame-work of the machine is very strongly braced.

In setting up the machine, the castings which constitute the base of the fieldmagnets may be secured together, and then to the knee pieces, or to each side of the flange of the knee-pieces, or to each other at their respective ends, and be centrally supported on any suitable diamagnetic face, as is most convenient. The grooves a, above referred to, which are formed on the interior faces of the poles of the field-magnets, may run diagonally across or meet at an oblique angle in the center, the grooving being intended to direct the lines of magnetic force and to extend the magnetic field in a concentrated form sufficiently far from the polar faces and toward the armature to allow free circulation of currents of air through the said grooves a while the armature is rotating, without being obliged, in order to secure ventilation, to place the said armature at too great a distance from the magnetic field.

The armature E is constructed as follows Upon a suitable shaft, M, are secured the hubs J, which are of diamagnetic metal, and are formed with, say, four arms, projecting radially therefrom. On the ends of these arms are formed the tenons V, having inclined shoulders P. The strips H, preferably of wood, are formed with inclined'grooved surfaces L, corresponding to the inclined shoulders P, and they are ridged, as shown at V, on their upper surface. The coils of the armature are wound in grooves 1), extending longitudinally, diagonally, or spirally in the direction of the axis or shaft M, which is centrally located in suitable bearings between the magnets A A.

The above-mentioned grooves D are formed as follows: Rings B, of soft iron, having teeth B extending from their periphery, and holes B are suitably secured together in the desired number to form an armature of the required length, each ring being insulated from the next one, the holes 13 and teeth B being arranged and secured so as to produce and form diagonal or longitudinal grooves between the teeth and diagonal or spiral passages through the connecting-holes from one end to the other of the armature so constructed, in which grooves the wire is afterward wound, and through which diagonal or spiral passages currents of air will be drawn by the rotation of the armature, thus securing thorough internal ventilation.

The armature is assembled as follows: The hubs J being placed on the shaft 31 and the strips H on the shoulders I, and the wound or unwound ring, constructed as above described, being then slipped over the said strips, rods Y are then passed through the hubs at each end, and being provided with suitable screwthreads the hubs J, being yet loose on the shaft M, may be drawn together, forcing the strips H outward until the ring or armature E is secured in the desired position, when the hubs should be secured to the shaft by set-screw J" or other suitable means.

My improved commutator is constructed as follows The thimble G is secured to the shaft M and threaded at one end, andit is covered by a cylinder, 0, of insulating material-for instance, vulcanitewhieh is secured thereto. The commutator-strips S, preferably of cop per, are formed with inclined end S and have two holes therein, as seen at S". The holes connect, and the bolt D passes through one of said holes into the cylinder 0, to secure the strip thereto, the adjoining hole being merely to allow the wire from the corresponding helix of the armature to be retained in the said strip and secured and connected thereto by the simple insertion of the screw D. The cylinder 0 being covered by the commutator-strips S, which are insulated from each other, the cap 0 is applied to the threaded end of the thimble G, and fitting over the inclined ends of the strips S secures them all in positiomand should be suitably insulated therefrom.

In order to remove one of the strips S, all that is necessary is to partially unscrew the cap 0 and remove the screw D, when the strip in question can be removed and replaced without disturbing any of the others in the series.

Having described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a dynamoeleetric generator, the fieldmagnets formed with grooves or corrugations a on the inner surface of their polar faces, substantially as and for the purpose specified.

2. The grooved or corrugated curved polar castings A A, in combination with the helices N N, knees O, and a suitable base, substan tially as shown and described.

3. The combination of shaft M, adjustable hubs J, providedwith tenons V and shoulders P, and the rods Y, with the strips H, having inclined grooved surfaces L, and rib Y and cylindrical ring-armature, substantially as described.

L. The armature consisting of aseries of in sulated iron rings, formed with a series of teeth extending radially from the periphery thereof,

and having a corresponding series of lateral holes therethrough, the said teeth and holes being arranged spirally with respect to the axis of motion, so as to form spiral grooves for the wire and spiral passages for the ventilating-currents, substantially as described.

5. The combination of the rings B, formed with teeth B and holes B suitable insulating material, and wire,with the adjustable hubs J, strips H, and shaft M.

6. The combination of the armature E, formed with the internal ventilating-passages and the spirally-arranged inductioncoils, with the curved corrugated field-magnets, substantially as shown and described.

7. The commutator consisting ofa metallic thimble "secured tothe armature-shaft, a cylinder of non-conducting material secured thereto, suitable metallic strips connected to the armature-coils and separately secured to the non-conducting cylinder, and a cap secured to the thimble and adapted to inclose the outer ends of all the commutator-strips, substantially as described.

8. The combination of thimble G, cylinder 0, strips S, cap 0, screw D, and the connectin g-wire, substantially as shown and described;

9. The combination of magnets AA, grooved on their polar faces, the armature having spirally-wound coils and spiral ventilating-passages, the adjustable mounting deviees, and the commut tor consisting of thimble B, insulating cylinder G, the detachable strips S, and cap 0, substantially as shown and described.

In testimony that I claim the foregoing as my own I aifix my signature in presence of two witnesses.

' JAMES DU SHANE.

' lVitnesses:

WILLIs A. BUG'BEE,

HENRY BIEGER. 

